# QX2303L50F

**QX Micro Devices** · DC-DC Converters · SOT-23-5

QX2303L50F from QX Micro Devices, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | EN | input | Chip enable, active high; a low level (below 0.2 V) puts the chip in shutdown with standby input current of 1 uA max, high level is at least 0.4*VOUT, and the voltage range is -0.3 V to VOUT+0.3 V. |
| 2 | VOUT | power_in | Input voltage pin per the pin table (boost output/supply node, 5.0 V for this QX2303L50F option); absolute maximum 7 V. |
| 3 | NC | unconnected | Not connected internally on the QX2303LXXF SOT23-5 version; leave floating. |
| 4 | GND | power_in | Power ground. |
| 5 | LX | output | Switching signal output to the inductor from the internal MOS switch; maximum LX current 1000 mA, maximum voltage 7 V, typical current limit 800 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | QX Micro Devices |
| Package | SOT-23-5 |
| Category | Power Management ICs |
| Pins | 5 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage | VINMAX | 0.7 |  |  | V |  | 6 |
| Current limit | ILIMIT | 600 | 800 | 1000 | mA |  | 6 |
| Output voltage accuracy | ΔVOUT | -2.5 |  | 2.5 | % |  | 6 |
| Standby input current | IINQ |  |  | 1 | uA | no load, EN low | 6 |
| EN low voltage |  |  |  | 0.2 | V |  | 6 |
| EN high input current |  |  |  | 0.1 | uA |  | 6 |
| EN low input current |  | -0.1 |  |  | uA |  | 6 |
| Maximum voltage at VOUT and LX | VMAX |  |  | 7 | V |  | 5 |
| EN pin voltage range | VMIN_MAX | -0.3 |  |  | V | upper limit VOUT+0.3 | 5 |
| Maximum LX current | ILX_MAX |  |  | 1000 | mA |  | 5 |
| SOT-23-5 maximum power dissipation | PSOT-23-5 |  |  | 0.25 | W |  | 5 |
| Operating temperature range | TA | -20 |  | 85 | °C |  | 5 |
| Storage temperature range | TSTG | -40 |  | 125 | °C |  | 5 |
| Soldering temperature | TSD | 230 |  | 240 | °C | time less than 30 s | 5 |
| ESD voltage (HBM) | VESD |  |  | 2000 | V | human body model | 5 |
| Output voltage temperature coefficient |  |  |  | 100 | ppm/°C | printed as less than 100 ppm/°C | 8 |
| Start-up voltage | VSTART |  | 0.8 |  | V | ILOAD=1mA, VIN from 0V to 2V | 6 |
| Hold voltage | VHOLD |  | 0.6 |  | V | ILOAD=1mA, VIN from 2V to 0V | 6 |
| No-load input current | IIN0 |  | 15 |  | uA | VIN=1.8V, VOUT=3.3V | 6 |
| Maximum oscillation frequency | FMAX |  | 300 |  | KHz |  | 6 |
| Maximum duty cycle | DCOSC |  | 83 |  | % |  | 6 |

## CAD (KiCad official)

- Symbol: `QX2303L50F`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `qx2303l50f-etched.step` / `qx2303l50f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `qx2303l50f.step` / `qx2303l50f.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [QX Micro Devices datasheet](docs/qx2303l50f-datasheet.pdf) (14 pp, sha256 `80cb4ae49c2e83f6`, retrieved 2026-10-22, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/qx2303l50f-datasheet.pdf)